Bullitt Wheels - How to open up bore?

I don't I think worries about "hub centric" are completely overblown. Most of my wheels from the 70's that I used were NOT hubcentric, most were aftermarket. I say take a die grinder and have at it

That POS old landcruiser I had never knew what hubcentric was, and it got dropped, kicked, hit, thrown, I don't know how else to describe what I did to that thing, in mudholes, rocks, logs, you name it. And it saw over a hundred a few times, too.